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From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH 4/8] ARM: davinci: add DEBUG_LL support
Date: Tue, 11 Mar 2014 01:34:37 +0400	[thread overview]
Message-ID: <1394487281-10462-5-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1394487281-10462-1-git-send-email-antonynpavlov@gmail.com>

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
 arch/arm/Kconfig                              |  1 +
 arch/arm/mach-davinci/include/mach/debug_ll.h | 42 +++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 42ff01b..407f27d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -57,6 +57,7 @@ config ARCH_CLPS711X
 config ARCH_DAVINCI
 	bool "TI Davinci"
 	select CPU_ARM926T
+	select HAS_DEBUG_LL
 
 config ARCH_EP93XX
 	bool "Cirrus Logic EP93xx"
diff --git a/arch/arm/mach-davinci/include/mach/debug_ll.h b/arch/arm/mach-davinci/include/mach/debug_ll.h
new file mode 100644
index 0000000..587f408
--- /dev/null
+++ b/arch/arm/mach-davinci/include/mach/debug_ll.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2014 Antony Pavlov <antonynpavlov@gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/** @file
+ *  This File contains declaration for early output support
+ */
+#ifndef __INCLUDE_ARCH_DEBUG_LL_H__
+#define __INCLUDE_ARCH_DEBUG_LL_H__
+
+#include <asm/io.h>
+#include <mach/serial.h>
+
+#define DEBUG_LL_UART_ADDR	DAVINCI_UART0_BASE
+#define DEBUG_LL_UART_RSHFT	2
+
+#define rbr		(0 << DEBUG_LL_UART_RSHFT)
+#define lsr		(5 << DEBUG_LL_UART_RSHFT)
+#define LSR_THRE	0x20	/* Xmit holding register empty */
+
+static inline void PUTC_LL(char ch)
+{
+	while (!(__raw_readb(DEBUG_LL_UART_ADDR + lsr) & LSR_THRE))
+		;
+
+	__raw_writeb(ch, DEBUG_LL_UART_ADDR + rbr);
+}
+
+#endif /* __INCLUDE_ARCH_DEBUG_LL_H__ */
-- 
1.9.0


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  parent reply	other threads:[~2014-03-10 21:35 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-10 21:34 [PATCH 0/8] ARM: initial support for TI DaVinci SoCs and virt2real board Antony Pavlov
2014-03-10 21:34 ` [PATCH 1/8] clocksource: add dummy software-only clocksource Antony Pavlov
2014-03-12 20:50   ` Sascha Hauer
2014-03-13  5:09     ` Antony Pavlov
2014-03-13  6:35       ` Sascha Hauer
2014-03-10 21:34 ` [PATCH 2/8] import _AC and UL macros from linux kernel Antony Pavlov
2014-03-10 21:34 ` [PATCH 3/8] ARM: initial support for TI DaVinci SoCs Antony Pavlov
2014-03-10 21:34 ` Antony Pavlov [this message]
2014-03-10 21:34 ` [PATCH 5/8] ARM: davinci: add documentation Antony Pavlov
2014-03-10 21:34 ` [PATCH 6/8] ARM: davinci: add virt2real board support Antony Pavlov
2014-03-10 21:34 ` [PATCH 7/8] ARM: virt2real: add documentation Antony Pavlov
2014-03-10 21:34 ` [PATCH 8/8] ARM: davinci: add virt2real_defconfig Antony Pavlov

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